CN106229023A - A kind of processing method of radioactive iodine pollution water - Google Patents
A kind of processing method of radioactive iodine pollution water Download PDFInfo
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- CN106229023A CN106229023A CN201610631528.8A CN201610631528A CN106229023A CN 106229023 A CN106229023 A CN 106229023A CN 201610631528 A CN201610631528 A CN 201610631528A CN 106229023 A CN106229023 A CN 106229023A
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- water
- iodine
- deoxidation
- radioactive
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/10—Processing by flocculation
Abstract
The present invention relates to the processing method of a kind of radioactive iodine pollution water；First the method by joining deoxidation/depositor in the former water of radioactive iodine pollution and sodium sulfite, makes sodium sulfite react completely with the dissolved oxygen in water, thus reaches deoxygenation purpose；Backward deoxidation/depositor in add Cu-lyt., make iodide ion to be removed in cuprous ion and water generate Hydro-Giene (Water Science). precipitation；Supernatant in deoxidation/depositor enters membrane separator, generates oarse-grained iodine copper ferrum precipitation with the hydrolyzate of iron chloride, is removed by precipitate through membrance separation, thus realize the removal of radioiodine from water.The present invention can reach higher iodine clearance and reduce the generation amount of radioactive solid waste, through engineering approaches application can be realized after amplification, it is applicable to process radioactive iodine pollution waste water and the emergency processing of radioactive iodine pollution drinking water, is the iodine removing method of a kind of economical and practical radioactive contamination of water.
Description
Technical field
The present invention relates to the treatment technology of a kind of radioactive pollution water, be exactly to remove drinking of radioactive iodine pollution
Water and waste water.
Background technology
Radioiodine derives from the fission reaction of uranium and plutonium, and the effect of organism is mainly shown as increasing thyroid carcinoma by it
With leukemic sickness rate, the harm to child is higher than adult.Radioactive nuclide iodine is Britain's Wen Cikaier nuclear accident, the U.S.
The common major pollutants of promise Baily nuclear power plant accident and Fukushima, Japan nuclear power plant accident are cut by three mile island nuclear station accident, the Soviet Union
One of, the radioactivity total amount being discharged in environment is respectively 7.4 × 1014Bq、5.5×1011Bq、8.0×1018Bq、1.6
×1017Bq.Along with the emergence of nuclear power and increasing of nuclear facilities, and radioiodine is led in medical science, industrial or agricultural and scientific research etc.
The extensive application in territory, the risk that water body is polluted by radioiodine nucleic is increasing, it is therefore desirable to set up the place of radioiodine nucleic
Reason method, is allowed to from alpha-contamination water body remove, to protect environmental and human health impacts.
The removal of waterborne radioactivity iodide ion, the method used at present has absorption, ion exchange and chemical precipitation.Commonly use
The active charcoal of adsorbent, zeolite etc., but the best to the removal effect of iodine；Use the adsorbent that the dippings such as silver, copper are modified, improve
The clearance of iodine, but modified relatively costly, and the easy leakage that impregnating agent occurs, actual application receives more restriction.Ion
Exchanger resin is poor to the selective absorption of iodine, and adsorption capacity is relatively low, and regeneration is frequent, processing cost is high.
Chemical precipitation method is to process big yield to be relatively easy to and effective ways, it is possible to reduce the generation of final solid waste
Amount, beneficially subsequent solid treatment of wastes produced.Bi3+、Hg2+、Ag+And Cu+Insoluble compound can be generated with iodide ion Deng all, thus
Remove the iodide ion in water；Univalent copper ion, because of hypotoxicity and low price, is to remove the ideal precipitation of iodide ion in water
Agent, when Red copper oxide, cuprous sulfide, copper/cupric system, univalent copper ion modified zeolite etc. removes the iodide ion in water, deposits
Higher at dosage, the problems such as kinetics is relatively low compared with slow and clearance, particularly tackle sudden nuclear leakage accident, be need
The technical barrier urgently to solve.
Inventor's early stage uses the Cu-lyt. sedimentation method to process radioactive iodine pollution water, under suitable process conditions, iodine
Clearance can reach 95.8% (An investigation into the use of cuprous chloride for
The removal of radioactive iodide from aqueous solutions, Journal of Hazardous
Materials, 2016,302:82-89).Activity concentration in view of radioactive iodine pollution water body is up to 1011-
1018Bq/L (see aforementioned nuclear power plant accident), the clearance of 95.8% is difficult to the removal requirement of radioactive iodine pollution, thus original
Research foundation on the Cu-lyt. sedimentation method are improved except iodine, add membrane separation unit, to improve the removal of iodine
Rate.
Summary of the invention
For problems of the prior art, the present invention proposes method associated with deoxygenation/chemical precipitation-membrance separation
Remove the iodine in radioactive contamination eliminating water, use sodium sulfite as oxygen scavenger, Cu-lyt. as precipitant and membrance separation conduct
Solid-liquid separation means reaches except iodine purpose.
First the method by joining deoxidation/depositor in the former water of radioactive iodine pollution and sodium sulfite, makes sulfurous acid
Sodium reacts completely with the dissolved oxygen in water, thus reaches deoxygenation purpose；Backward deoxidation/depositor in add Cu-lyt., make
The iodide ion generation Hydro-Giene (Water Science). precipitation that cuprous ion is to be removed with water；Supernatant in deoxidation/depositor enters membrance separation
Device, generates oarse-grained iodine copper ferrum precipitation with the hydrolyzate of iron chloride, is removed by precipitate through membrance separation from water, thus real
The removal of existing radioiodine.
The method step of said method is as follows:
1) deoxidation: add sodium sulfite to deoxidation/depositor and stir reaction, that removes in the former water of radioactive iodine pollution is molten
Solve oxygen；
2) precipitation is except iodine: add Cu-lyt. to deoxidation/depositor, make cuprous ion and the iodine in radioactive pollution water from
Son generates Hydro-Giene (Water Science). precipitation except Iod R；
3) membrance separation removes iodine: add iron chloride to membrane separator, and the supernatant in deoxidation/depositor enters membrane separator,
Generate oarse-grained iodine copper ferrum precipitation with the hydrolyzate of iron chloride, in membrance separation is trapped within membrance separation, remove in water
Radioiodine.
Described step 2) in add the Cu-lyt. of 150mg/L to deoxidation/depositor.
Described step 3) in membrane separator add 10-20mg/L iron chloride.
Described step 1) in the former water of radioactive iodine pollution the mass concentration of iodide ion be 5-10mg/L；Matter when iodide ion
Amount concentration < during 5mg/L, first adds inactive potassium iodide or sodium iodide, makes the iodide ion mass concentration in former water reach 5-
Process again after 10mg/L.
Described step 1) in the deoxygenation time be 2-3 minute.
Described step 2) in except the Iod R time be 3-5 minute, the sedimentation time is 5-8 minute.
Described step 3) in the pending supernatant water time of staying in membrane separator be 10-15 minute.
9. method as claimed in claim 2, is characterized in that described step 3) in membrance separation be the ultrafiltration during water processes
Or microfiltration.
It is an advantage of the current invention that: the present invention can reach higher iodine clearance and reduce the product of radioactive solid waste
Raw amount, has reached lab scale level, can realize through engineering approaches application, it is adaptable to process radioactive iodine pollution waste water and radioactivity after amplification
The emergency processing of iodine polluted drinking water, is the iodine removing method of a kind of economical and practical radioactive contamination of water.
Accompanying drawing explanation
Fig. 1: for the Experimental equipment of the embodiment of the present invention.
In figure: 1-elevator pump；2-deoxidation/sedimentation tank；3-dosing pump；4-fluid reservoir；5-agitator；6-solid adds pump；
7-elevator pump；8-membrane separator；9--dosing pump；10 fluid reservoirs-；11-membrane module；12-goes out water pump.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention are illustrated.It should be noted that the present embodiment is narrative
Rather than determinate, do not limit protection scope of the present invention with this embodiment.
Specific operation process is: elevator pump 1 by the mass concentration of iodide ion in polluted raw be 5-10mg/L add deoxidation/
Sedimentation tank 2, dosing pump 3 is by the Na in fluid reservoir 4 simultaneously2SO3Solution adds, and is sufficiently mixed by agitator 5, during deoxygenation
Between be 2-3 minute；Open solid to add pump 6 CuCl adds deoxidation/sedimentation tank 2, except the Iod R time is to close after 3-5 minute
Agitator 5, starts to staticly settle 5-8 minute；Supernatant in deoxidation/sedimentation tank 2 is added membrane separator 8 by elevator pump 7, simultaneously
Dosing pump 9 is by the FeCl in fluid reservoir 103Solution adds 10-20mg/L and stirs mixing, through membrane module after reacting 10-15 minute
11 and go out water pump 12 and carry out solid-liquid separation water outlet, thus remove the iodide ion in radioactive water.
Embodiment 1: utilizing described method to process simulated emission activity is 1 × 103Bq/L containing the iodine waste water (quality of iodine
Concentration is 2.17 × 10-13g/L).Experiment starts forward simulation radioactivity and adds potassium iodide containing in the former water of iodine, and the quality making iodine is dense
Degree reaches 5mg/L；Experiment specific operation process is as it has been described above, use deoxygenation/chemical precipitation/membrane separation process to process and drink containing iodine
Water, CuCl dosage is 150mg/L, FeCl3Dosage is 10mg/L.The mass concentration of water outlet iodine is 0.20mg/L.This technique
The removal efficiency of iodide ion is 96.0%, and going out water-borne radioactivity is 40Bq/L.
Embodiment 1: utilizing described method to process simulated emission activity is 1 × 103Bq/L containing the iodine waste water (quality of iodine
Concentration is 2.17 × 10-13g/L).Experiment starts forward simulation radioactivity and adds potassium iodide containing in the former water of iodine, and the quality making iodine is dense
Degree reaches 5mg/L；Experiment specific operation process is as it has been described above, use deoxygenation/chemical precipitation/membrane separation process to process and drink containing iodine
Water, CuCl dosage is 150mg/L, FeCl3Dosage is 20mg/L.The mass concentration of water outlet iodine is 0.18mg/L.This technique
The removal efficiency of iodide ion is 96.4%, and going out water-borne radioactivity is 36Bq/L.
Embodiment 2: utilizing described method to process simulated emission activity is 1 × 103Bq/L containing the iodine waste water (quality of iodine
Concentration is 2.17 × 10-12g/L).Experiment starts forward simulation radioactivity and adds potassium iodide containing in the former water of iodine, and the quality making iodine is dense
Degree reaches 10mg/L；Experiment specific operation process is as it has been described above, use deoxygenation/chemical precipitation/membrane separation process to process and drink containing iodine
With water, CuCl dosage is 150mg/L, FeCl3Dosage is 20mg/L.The mass concentration of water outlet iodine is stable at 0.14mg/L.
The removal efficiency of this technique iodide ion is 97.2%, and going out water-borne radioactivity is 28Bq/L.
Claims (9)
1. the processing method of a radioactive iodine pollution water；It is characterized in that using sodium sulfite to make as oxygen scavenger, Cu-lyt.
For precipitant and membrance separation as solid-liquid separating method.
2. the method for claim 1, is characterized in that step is as follows:
1) deoxidation: add sodium sulfite to deoxidation/depositor and stir reaction, removes the dissolving in the former water of radioactive iodine pollution
Oxygen；2) precipitation is except iodine: add Cu-lyt. to deoxidation/depositor, makes cuprous ion raw with the iodide ion in radioactive pollution water
Become Hydro-Giene (Water Science). precipitation；
3) membrance separation removes iodine: add iron chloride to membrane separator, and the supernatant in deoxidation/depositor enters membrane separator, with chlorine
The hydrolyzate changing ferrum generates oarse-grained iodine copper ferrum precipitation, in membrance separation is trapped within membrance separation, removes the radiation in water
Property iodine.
3. method as claimed in claim 2, is characterized in that described step 2) in add the chlorine of 150mg/L to deoxidation/depositor
Change cuprous.
4. method as claimed in claim 2, is characterized in that described step 3) in add the chlorination of 10-20mg/L to membrane separator
Ferrum.
5. method as claimed in claim 2, is characterized in that described step 1) in the matter of iodide ion in the former water of radioactive iodine pollution
Amount concentration is 5-10mg/L；When the mass concentration of iodide ion < during 5mg/L, first adds inactive potassium iodide or sodium iodide, makes
Iodide ion mass concentration in former water processes after reaching 5-10mg/L again.
6. method as claimed in claim 2, is characterized in that described step 1) in the deoxygenation time be 2-3 minute.
7. method as claimed in claim 2, is characterized in that described step 2) in precipitation except the Iod R time be 3-5 minute, heavy
The shallow lake time is 5-8 minute.
8. method as claimed in claim 2, is characterized in that described step 3) in the stop in membrane separator of the pending water time
Between be 10-15 minute.
9. method as claimed in claim 2, is characterized in that described step 3) in membrance separation be the ultrafiltration or micro-during water processes
Filter.
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| CN201610631528.8A CN106229023A (en) | 2016-10-08 | 2016-10-08 | A kind of processing method of radioactive iodine pollution water |
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| CN201610631528.8A CN106229023A (en) | 2016-10-08 | 2016-10-08 | A kind of processing method of radioactive iodine pollution water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107993734A (en) * | 2017-12-01 | 2018-05-04 | 天津大学 | A kind of processing method by radioiodine ionic soil water body |
| CN109448881A (en) * | 2018-12-05 | 2019-03-08 | 天津大学 | The devices and methods therefor of multistep Combined Treatment radioactive iodine pollution water |
| CN109621727A (en) * | 2018-12-04 | 2019-04-16 | 天津大学 | A kind of method of iodide ion in ultra-low-pressure reverse osmosis system and its processing radioactive pollution water |
| CN112629998A (en) * | 2021-01-06 | 2021-04-09 | 三门核电有限公司 | Device and method for analyzing and preprocessing total alpha and beta in primary loop medium of nuclear power plant |
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| CN103345954A (en) * | 2013-06-20 | 2013-10-09 | 哈尔滨工业大学 | Water treatment method of removing radioactive iodine pollutants by using permanganate and activated carbon together |
| CN104773863A (en) * | 2015-02-13 | 2015-07-15 | 湖南永清环保研究院有限责任公司 | Deep purification process for thallium-containing waste water |
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| CN102303932A (en) * | 2011-08-19 | 2012-01-04 | 深圳市水务(集团)有限公司 | Method for removing micro amount of thallium from drinking water by two-stage oxidization |
| CN103345954A (en) * | 2013-06-20 | 2013-10-09 | 哈尔滨工业大学 | Water treatment method of removing radioactive iodine pollutants by using permanganate and activated carbon together |
| CN104773863A (en) * | 2015-02-13 | 2015-07-15 | 湖南永清环保研究院有限责任公司 | Deep purification process for thallium-containing waste water |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107993734A (en) * | 2017-12-01 | 2018-05-04 | 天津大学 | A kind of processing method by radioiodine ionic soil water body |
| CN107993734B (en) * | 2017-12-01 | 2021-07-06 | 天津大学 | Method for treating water polluted by radioactive iodide ions |
| CN109621727A (en) * | 2018-12-04 | 2019-04-16 | 天津大学 | A kind of method of iodide ion in ultra-low-pressure reverse osmosis system and its processing radioactive pollution water |
| CN109621727B (en) * | 2018-12-04 | 2021-01-26 | 天津大学 | Ultra-low pressure reverse osmosis system and method for treating iodine ions in radioactive polluted water by using same |
| CN109448881A (en) * | 2018-12-05 | 2019-03-08 | 天津大学 | The devices and methods therefor of multistep Combined Treatment radioactive iodine pollution water |
| CN112629998A (en) * | 2021-01-06 | 2021-04-09 | 三门核电有限公司 | Device and method for analyzing and preprocessing total alpha and beta in primary loop medium of nuclear power plant |
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